Method of and means for making photographic paper, film, or the like



W. B. DAILEY METHOD OF AND MEANS FOR MAKING PHOTOGRAPHIC PAPER, FILM OR THE LIKE I Filed Feb. 1, 1924 INVENTORI ATTORNEYS.

' coating to a photographic medium base, such as paper, film or other sheet material, in one and the same operation; to enable the two coatings to be dried at the same time,

Patented Jan. 15, 1929.

UNITED STATES 1,699,349 PATENT OFFICE.

WILLIAM B. BAILEY, OF EAST ORANGE, JERSEY.

METHOD OF AND MEANS FOR MAKING PHOTOGRAPHIC PAPER, FILM, OR THE LIKE.

Application filed February The objects of this invention are to apply ,a light-sensitive coating and a protective and thus equally in finishing the product; to save time, labor, expense, apparatus and space therefor, and to obtain other advantages and results as may be brought out by the following description.

Referrin to the accompanying drawing, the single gure thereof is a diagrammatic illustration of one means for carrying out my improved method.

It w1ll be understood that my improvements can be utilized in connection with any light-sensitive photographic medium, comprising a base such as paper, film, or any other kind of a sheet, to which a lightsensitive coating of any kind is applied,

such as gelatine with which any light-sensitive salt, such as silver, platinum or other usual substance, has been incorporated, and

upon which coating it is desired to superpose a second coating which shall protect the light-sensitive coating against abrasion, friction marks and the like caused by contact of objects with said light-sensitive coating, for example, a secon coating of nonsensitized gelatine.

To illustrate my invention, I have shown in the drawing a roll 1 of paper or any other suitably flexible sheet material to be coated upon its side 2, and have shown such sheet material led through suitable feeding and tension rolls 3 to a coating roll 4, where the sheet material dips its surface 2 into sensitized gelatine 5, of any well-known kind, in a container 6 which can be adjustedtoward and away from the roll 4, as by slots 7 and is warmed in'any ordinary and wellknown manner to keep the gelatine liquid. From this coating roll 4 the sheet material is directed as by rollers 8 and 9 to a cooling chamber or duct 10 which serves to set the gelatine coating sufficiently to receive the second or unsensitized protective coating. For this purpose, the sheet material after leaving-the cooling chamber 10 passes to a second coatin means which applies to the already coate side of the sheet material a second coatin preferably gelatine, which is nnsensitize and adapted to be applied similar to the first coating. For convenience I have shown this coating applied by a roll 1, 1924. serial No. 689,929.

11 from a container 12 which is adjustable by "means of slots 13, similar to the first coat-applying means, but it might be of any other construction commonly used for applying coatings. After receiving this second coating the sheet material passes through a cooling chamber or duct 14 to set the coating, and then after leaving a directing roller 15 it islooped and thoroughly dried in the usual manner for packaging, as at 16.

material and that the means for supporting the material while so coated are all at the opposite side of the path of the material, so

that the first coatingdoes not engage anything solid before the second coatmg is applied and therefore cannot be marred in any way. If the coatings were dried separately, so that the material with its first coat were rolled, said, coating would be damaged so as to greatly impair the photographic material,

and by my improved method of drying both coatings at once I enable such rolling to be avoided. I

Any suitable means may be employed for causin the sheet material to unwind from the roll throu h the cooling chambers and so forth until 1t is ready for packaging, and I have indicated such means by a belt 17 from a driving member 18 extending to a pulley 19 on the same shaft with the roller 8 and a belt 20 extending from another pulley 21 'onsaid shaft to a pulley 22 on the same shaft with the roller 15.

While I have shown for illustrative purposes one means for producing my im roved photographic paper, film or the like, to point out that the coatings can be applied in any other suitable and well-known manner than b the rolls shown, and either the same or di erent means can be used forthe two coatings. Furthermore, various kinds of sheet material and of coatings, either sensitive or protective, may be employed by those skilled in the art, without departing from the spirit and scope of the invention,

desire 1 and travel over its coating rolls,

and I do not wish to be understood as limiting myself except as required by the followmg claims when construed in the light of.

the prior art.

Having thus described the invention, what I claim is:

1. The method of making a light-sensitive photographic medium, which consists in applying to sheet material a lightsensitive coating, causing the same to set, superposing a protective coating upon said sensitive coating while so set and before it. is dry,

and drying'both saidcoatings at the same time.

2. The method ofmaking a light-sensitive photographic medium, which consists in applying to sheet material a light-sensitive coating, causing the sameto set, superposing upon said sensitive coating while so set and before it is dry a protective coating of the same body material, and drying both said coatino'sat the same time.

3. e methodof making a light-sensitive photographic medium, which consists in applying to sheet material a light-sensitive gelatine coating, causing the same to set, superposing a protective gelatine coating upon said sensitive gelatine coating while so set and before it is dry, and drying both said coatings at the same time.

at. The method or to g a light-sensitive photographic medium, which consists in applying to sheet material a light-sensitive coating in warm liquid condition, chilling the same to cause it to set, snperposing a 'rotective coating'u on said sensitive coating while so set an before it is.dry,\and

drying both said coatings at the same time. i

5. The method of making a light-sensitive photographic medium, which consists in ap--' plying to sheet material a li ht sensitive coating in warm liquid condition, chilling photographic medium, which consists in apthe same to cause it to set, superposing upon the sensitive coating while so set and before it is dry a protective coating in warm liquid condition, chilling said second coating to cause it to set, and drying both said coatings plying to sheet material a light sensitive coating, causing said coating to set apply ing a protective coatingto said lig t-sensitive. coating before it is dry, causing said protective coating to set and drying both coatings at the same time.

9. The combination with means for applying a light-sensitive coating to sheet material, means for drying the coated material, and means for conveying said material from said coating means to said drying means, of means for applying a protective coating upon said light-sensitive coating before the sheet material reaches the dryin means and far enough beyond the means or applying" the light-sensitive coating for said coating to have set. 7

. 10. The combination with means for applying a light-sensitive coating to sheet material, means for drying the coated material,

and means for conveying said material from said coating means to said drying means, oi means for applying a protective coating upon said light-sensitive coating before the sheet material, reaches the drying means, and means between said means for applying the light-sensitive coating and means for apply.

ing the protective coating for causing the light-sensitive coating to set.

11. The combination with means for ap plying a light-sensitive coating to sheetmaterial, means for drying the coated material, and means for conveying said material from means for applying a protective coating upon said lig t-sensitive coating before the sheet material reaches the dryin means, means between said means for app ying the light-sensitive coating and means tor appl in .the protective coating for causing t e lig t-sensitive coating to set, and means between said means for a plying the protecti-ve coating and means or drying for cans-- ng said protective coating to set.

12. The process or forming a photographic film which comprises applying to a sheet a liquid coating of sensitized emiul'sion, only partially hardening said coating, applying to-said coating a protective liquid coating,

and d rl'ying the film so formed.

- 18. he process of forming a photographic film which comprises applying to a sheet a liquid coating of: sensiti ing said coating Without drying it, applying to said coating while, wet a. protective liquid coating and drying the film so formed. v

d emulsion, chillsaid coating meansto said drying means, ot

lltlll he recess of forming a photographic film whic comprises coatin a sheet with sensitized emulsion, partially ardening said coating, and applylng thereto before drying a protective liquid coatin hardenin said liquid coating, and then rying the lm so formed.

15. 'An apparatus for forming photogra hie films comprising means for coating, a. siieet witlr ensitized emulsion, a cooling device adapted to receive said sheet from said means, means for coating said emulsion before drying and ada ted to directly receive the sheet from sai cooling means and apply the second coating .while the emulsion is still wet, a second cooling means adapted to receive the sheet from said last named means, and film drying means for receiving the sheet from said second cooling means.

l6. An apparatus for forming photographic films, comprising means for coating :1 sheet with sensitized emulsion, a cooling device adapted to receive said sheet from said means, means for coating said emulsion before drying adapted to directly receive the sheet from said cooling means and apply the second coating while the emulsion is still wet, a second cooling means adapted to receive the sheet from said last named means, and film drying means for receiving the sheet from said second cooling means, said apparatus being constructed to maintain the coated-surfaces of said sheet free from contact with any portion of said apparatus.

17. In an apparatus for forming a photographic film, a container roviding a bath or coating one side of t e film with an emulsion, intermediate coating means partially hardening the coating without drying it, a container providing a second bath for applying a second coating to the same side of said film while the emulsion is still wet, and guiding-means for receiving the said film from the first bath container and delivering the same to the second bath con tainer, said guiding means engaging only the uncoated side of said film throughout all of said operations.

18. The processof forming a photographic film comprising applying a freslr emulsion film to the film base, setting said film by refrigeration and then immediately applying an outer protective coating, coolin both coatings together to set them, and rying the composltely coated film.

WILLIAM B. DAILEY. 

